KR20040021099A - Clothes dryer and method for controlling the same - Google Patents
Clothes dryer and method for controlling the same Download PDFInfo
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- KR20040021099A KR20040021099A KR1020020052548A KR20020052548A KR20040021099A KR 20040021099 A KR20040021099 A KR 20040021099A KR 1020020052548 A KR1020020052548 A KR 1020020052548A KR 20020052548 A KR20020052548 A KR 20020052548A KR 20040021099 A KR20040021099 A KR 20040021099A
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- drying
- electromotive force
- clothes dryer
- controller
- load
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Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
- D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
- D06F58/04—Details
- D06F58/08—Driving arrangements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
- D06F2103/46—Current or voltage of the motor driving the drum
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/28—Electric heating
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/56—Remaining operation time; Remaining operational cycles
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/62—Stopping or disabling machine operation
Abstract
Description
본 발명은 의류 등을 건조하는 장치 및 이를 제어하는 방법에 관한 것으로,특히 건조드럼 내부에 수용된 건조대상 의류의 양에 따라 적절한 온도 및 풍량 제어가 가능하도록 한 의류건조기 및 그의 제어방법에 관한 것이다.The present invention relates to an apparatus for drying clothes and the like and a method of controlling the same, and more particularly, to a clothes dryer and a control method thereof for enabling proper temperature and air flow control according to the amount of clothes to be dried contained in a drying drum.
일반적으로, 의류건조기는 세탁이 완료된 젖은 상태의 건조대상물(예컨대 의류)을 자동으로 건조시켜 주도록 하는 기기로서, 외기를 도입하여 히터로 가열한 다음, 가열된 고온의 외기를 회전상태의 건조드럼 내부에 인입시킴으로써 건조드럼 내부에 수용된 의류 등의 건조대상물을 건조시킨다.In general, a clothes dryer is a device for automatically drying a wet object to be dried (for example, clothing) after washing. The clothes dryer introduces external air, heats it with a heater, and then heats the heated outdoor air in a rotating drum in a rotating state. The object to be dried is dried by drying the clothes or the like contained in the drying drum.
이러한 통상의 의류건조기는 건조대상물을 수용하는 건조드럼의 전방에 접촉식 건조도 센서가 설치되어 건조대상물의 건조도, 즉 건조대상물의 함수율(含水率)을 측정할 수 있도록 되어 있으며, 이 측정된 건조도에 의해 건조상태를 파악하여 건조시간 또는 공급되는 풍량, 히터의 가열온도 등을 제어한다.Such a conventional clothes dryer is provided with a contact dryness sensor installed in front of a drying drum containing a drying object to measure the dryness of the drying object, that is, the moisture content of the drying object. The drying condition is grasped by the degree of drying to control the drying time, the amount of air supplied, and the heating temperature of the heater.
그러나, 전술한 바와 같이 종래의 의류건조기들은 건조대상물의 건조상태를 접촉식 건조도 센서에 의해 전달받기 때문에 전체적인 건조대상물의 건조상태에 대한 정보를 얻지 못하고 건조도 센서와 접촉하고 있는 일부 건조대상물들의 건조상태에 대한 정보만을 얻게 되어 건조 효율이 저하되며 과건조의 위험이 존재할 뿐만 아니라, 건조대상물의 양이 적을 경우에는 건조도 센서에 건조대상물이 접촉되지 않아서 건조가 완료된 것으로 판단하여 건조대상물이 완전히 건조되기 전에 건조행정이 종료되는 등의 문제점이 있었다.However, as described above, the conventional clothes dryers receive the dry state of the dry object by the contact dryness sensor and thus do not obtain information on the dry state of the dry object. Only the information on the drying status is reduced, the drying efficiency is lowered and there is a risk of overdrying. In addition, when the amount of the drying target is small, the drying target is judged to be complete because the drying target does not come into contact with the dryness sensor. There was a problem that the drying administration is terminated before it is dried.
즉, 옷감을 손상시키지 않으면서 신속한 건조를 수행하기 위해서는 건조대상물의 건조도를 알아야 하지만, 전술한 것과 같이 건조드럼의 전방의 배기측에 위치하는 접촉식 건조도 센서를 이용하여 건조도(함수율)을 측정할 경우, 건조도 센서와 접촉하고 있는 건조대상물의 건조가 다른 건조대상물들보다 상대적으로 늦게 진행되므로 건조드럼 내의 흡입측에 위치한 건조대상물들은 과건조되어 옷감이 상하게 될 가능성이 높을 뿐만 아니라, 건조대상물과 건조도 센서 간의 접촉이 이루어지지 않아서 건조대상물이 완전히 건조되기 전에 건조행정이 종료될 수 있다.That is, in order to perform a quick drying without damaging the fabric, the dryness of the drying object should be known, but as described above, the dryness (water content) using the contact dryness sensor located on the exhaust side in front of the drying drum. In the case of measuring, since the drying of the drying object in contact with the dryness sensor proceeds relatively later than the other drying objects, the drying objects placed on the suction side of the drying drum are likely to be overdried and the fabric may be damaged. Since the contact between the dry object and the dryness sensor is not made, the drying administration may be terminated before the dry object is completely dried.
이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 모터의 초기 기동시 부가되는 역기전력을 이용하여 부하량을 측정하고, 이 측정된 부하량에 따라 최적의 건조조건을 설정함과 더불어 건조행정 상태를 파악하여 운전을 수행함으로써 더욱 정밀하고 효과적인 건조행정의 제어가 이루어질 수 있도록 한 의류건조기 및 그의 제어방법을 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, the load is measured by using the back electromotive force added during the initial startup of the motor, and the optimum drying conditions according to the measured load amount and drying administration state The purpose of the present invention is to provide a clothes dryer and a control method thereof, by which the control of the drying operation can be made more precisely and effectively.
도 1은 본 발명에 따른 의류건조기의 구성의 일례를 나타낸 요부 단면도1 is a cross-sectional view of the main portion showing an example of the configuration of the clothes dryer according to the present invention
도 2는 본 발명에 따른 의류건조기 제어방법을 설명하는 순서도2 is a flow chart illustrating a method for controlling a clothes dryer according to the present invention.
도 3은 초기 기동시 부가되는 역기전력과 부하량의 관계를 설명하는 그래프3 is a graph for explaining the relationship between the counter electromotive force and the load amount added at initial startup;
도 4는 부하별 함수율 변화를 나타낸 그래프4 is a graph showing the change in moisture content per load
* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
1 : 본체 3 : 건조드럼1: main body 3: drying drum
5 : 히터 7 : 흡입덕트5 heater 7 suction duct
8 : 린트덕트 10 : 구동모터8: lint duct 10: drive motor
12 : 동력전달벨트13 : 송풍팬12: power transmission belt 13: blower fan
15 : 배기덕트20 : 역기전력 감지센서15: exhaust duct 20: counter electromotive force sensor
상기와 같은 목적을 달성하기 위한 본 발명의 한 형태에 의하면, 본체 내부에 회전가능하게 설치된 건조드럼과, 상기 건조드럼을 회전시키는 구동모터과, 열풍을 생성하여 상기 건조드럼 내부에 열풍을 공급하는 열풍공급수단 및, 상기 구동모터와 열풍공급수단의 작동을 제어하는 컨트롤러를 포함하여 구성된 의류건조기에 있어서, 상기 구동모터의 역기전력량을 검출하여 의류건조기의 컨트롤러에 전달하는 역기전력 감지센서가 설치된 것을 특징으로 하는 의류건조기가 제공된다.According to an aspect of the present invention for achieving the above object, a drying drum rotatably installed in the main body, a drive motor for rotating the drying drum, hot air to generate hot air to supply hot air to the drying drum; In the clothes dryer comprising a supply means and a controller for controlling the operation of the drive motor and hot air supply means, characterized in that the back electromotive force detection sensor for detecting the amount of back electromotive force of the drive motor to deliver to the controller of the clothes dryer. A clothes dryer is provided.
또한, 본 발명의 다른 한 형태에 의하면, 상기와 같은 의류건조기를 제어하는 방법으로, 구동모터의 기동시, 역기전력 감지센서가 역기전력을 측정하여 컨트롤러에 전달하는 단계; 컨트롤러에서 측정된 역기전력에 의해 초기 부하량을 산출하는 단계; 산출된 부하량에 따라 건조 조건을 설정하는 단계로 이루어진 의류건조기의 제어방법을 제공한다.In addition, according to another aspect of the present invention, in the method for controlling the clothes dryer as described above, at the start of the drive motor, the back electromotive force sensing sensor to measure the back electromotive force to the controller; Calculating an initial load by the counter electromotive force measured by the controller; It provides a control method of the clothes dryer comprising the steps of setting the drying conditions in accordance with the calculated load.
본 발명에 따른 의류건조기의 제어방법의 다른 한 실시형태에 의하면, 상기 건조 조건을 설정하는 단계이후, 일정시간이 경과한 다음 구동모터를 수회 정지 및 재가동하면서 부하량을 재측정하고, 부하량 변화율이 설정치 이하로 되면 건조행정을 종료하도록 되어 있다.According to another embodiment of the method for controlling a clothes dryer according to the present invention, after the step of setting the drying condition, after a predetermined time has elapsed, the driving motor is re-measured while stopping and restarting the drive motor several times, and the load change rate is set to the set value. If it is below, it will stop drying.
이하, 본 발명에 따른 의류건조기 및 그의 제어방법의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the clothes dryer and its control method according to the present invention will be described in detail.
도 1은 본 발명에 따른 의류건조기의 구성을 나타낸 도면으로, 의류건조기의 외부 케이스를 이루는 본체(1) 전방에 도어(2)가 설치되고, 본체(1) 내부에는 전,후방부가 개방되게 형성되고 복수개의 리프터(4)가 형성된 건조드럼(3)이 구동수단에 의해 회전가능하게 설치되며, 본체(1) 하부 일측에 외부로부터 흡입된 공기를 가열하여 열풍을 생성하는 히터(5)가 설치된다.1 is a view showing the configuration of a clothes dryer according to the present invention, the door (2) is installed in front of the main body (1) forming an outer case of the clothes dryer, and the front and rear inside the main body (1) is formed to be open And a drying drum 3 on which a plurality of lifters 4 are formed is rotatably installed by a driving means, and a heater 5 is installed on one side of the lower part of the main body 1 to generate hot air by heating air sucked from the outside. do.
상기 건조드럼(3)의 후방에는 히터(5)에 의해 생성된 열풍을 건조드럼(3) 내로 안내하는 흡입덕트(7)가 연통되게 설치되는 한편, 건조드럼(3)의 전방에는 건조드럼(3) 내의 공기를 배출시키기 위한 린트덕트(8)가 연통되게 설치되며, 이 린트덕트(8)는 배기덕트(15)와 연결된다.At the rear of the drying drum 3, a suction duct 7 for guiding the hot air generated by the heater 5 into the drying drum 3 is installed in communication with the drying drum 3, and in front of the drying drum 3, a drying drum ( 3) A lint duct 8 for discharging air in the air is installed in communication with the lint duct 8, which is connected to the exhaust duct 15.
그리고, 상기 린트덕트(8) 후방에는 외부로부터 공기를 강제 흡입하여 상기 배기덕트(15)로 강제 송풍하기 위한 송풍팬(13)이 설치된다.In addition, a blowing fan 13 is installed at the rear of the lint duct 8 to forcibly suck air from the outside and forcibly blow the air into the exhaust duct 15.
또한, 상기 린트덕트(8)와 건조드럼(3)의 연결부분에는 건조드럼(3)으로부터배출되는 공기에서 보푸라기 등의 이물질을 걸러내기 위한 필터(14)가 설치되어 있다.In addition, the connecting portion of the lint duct 8 and the drying drum 3 is provided with a filter 14 for filtering foreign matter such as lint from the air discharged from the drying drum 3.
상기 건조드럼(3)을 회전시키는 구동수단은 본체(1) 하부에 설치되는 구동모터(10)와, 상기 구동모터(10)에 결합된 풀리(11)와 건조드럼(3)의 외주면에 걸쳐지도록 되어 풀리(11)의 회전력을 건조드럼(3)에 전달하는 동력전달벨트(12)로 이루어져, 상기 구동모터(10)의 회전에 의해 구동풀리(11)가 회전하게 되면 구동풀리(11)에 감겨진 동력전달벨트(12)가 회전하면서 건조드럼(3)을 회전시키도록 되어 있다.The driving means for rotating the drying drum (3) is the drive motor 10 is installed on the lower body 1, the pulley 11 and the outer peripheral surface of the drying drum (3) coupled to the drive motor 10 It consists of a power transmission belt 12 which transmits the rotational force of the pulley (11) to the drying drum (3), the drive pulley (11) when the drive pulley (11) is rotated by the rotation of the drive motor (10) The power transmission belt 12 wound around is rotated to rotate the drying drum 3.
상기 송풍팬(13)은 상기 구동모터(10)의 풀리(11) 반대편으로 연장된 구동축(미도시)에 결합되어 구동모터(10)의 작동시 함께 작동한다.The blowing fan 13 is coupled to a drive shaft (not shown) extending to the opposite side of the pulley 11 of the drive motor 10 to operate together when the drive motor 10 operates.
그리고, 상기 구동모터(10)에는 초기 기동시 건조드럼(3)의 중량에 의해 부가되는 역기전력을 측정하여 의류건조기의 컨트롤러(미도시)로 전달하는 역기전력 감지센서(20)가 연결되어 있다.In addition, the driving motor 10 is connected to the back electromotive force sensor 20 for measuring the back electromotive force added by the weight of the drying drum (3) at the initial start to transmit to the controller (not shown) of the clothes dryer.
이하, 상기와 같이 구성된 의류건조기의 제어방법을 도 2 내지 도 4를 참조하여 설명한다.Hereinafter, a control method of the clothes dryer configured as described above will be described with reference to FIGS. 2 to 4.
사용자가 건조드럼(3) 내측에 건조대상물인 의류 등을 투입한 후 건조행정을 수행시키면, 히터(5) 및 구동모터(10)가 작동되어 건조드럼(3)이 회전됨과 동시에 송풍팬(13)이 회전하게 된다.(S1)When the user performs a drying stroke after putting clothes such as a drying object into the drying drum 3, the heater 5 and the driving motor 10 are operated to rotate the drying drum 3 and simultaneously blow a fan 13. ) Is rotated (S1).
그리고, 외기의 공기가 흡입되어 히터(5)에 의해 가열된 후, 흡입덕트(7)를 통해 회전상태의 건조드럼(3) 내측으로 유입되어 건조를 수행하게 된다.건조드럼(3) 내로 유입된 열풍은 젖은 상태의 건조대상물의 수분을 증발시켜 건조시킨 다음, 저온 고습의 공기가 되어 린트덕트(8) 및 배기덕트(15)를 차례로 통과하여 외부로 배출된다.Then, after the air of the outside air is sucked and heated by the heater 5, the air flows into the drying drum 3 in the rotating state through the suction duct 7 to perform drying. The hot air is dried by evaporating the moisture of the dry object in the wet state, and then becomes air of low temperature and high humidity, and passes through the lint duct 8 and the exhaust duct 15 in order to be discharged to the outside.
여기서, 상기 구동모터(10)가 기동하기 시작할 때 건조드럼(3)의 중량에 의해 구동모터(10)에 역기전력이 부가되는 바, 상기 역기전력 감지센서(20)는 이때 부가되는 역기전력을 측정하여 컨트롤러에 전달한다.(S2)In this case, when the driving motor 10 starts to be started, the counter electromotive force is added to the driving motor 10 by the weight of the drying drum 3, and the counter electromotive force sensor 20 measures the counter electromotive force added at this time. (S2)
상기 구동모터(10)에 부가되는 역기전력은 도 3에 도시된 것과 같이 건조드럼(3)의 중량, 즉 부하량과 비례하므로, 컨트롤러에서는 미리 입력된 역기전력과 부하량 간의 관계를 이용해 부하량을 검출하고(S3), 이 검출된 부하량에 따라 히터(5)의 가열온도, 송풍팬(13)의 회전수, 건조시간 등의 건조 조건을 최적으로 설정하여 건조행정을 진행하게 된다.(S4)Since the counter electromotive force added to the driving motor 10 is proportional to the weight of the drying drum 3, that is, the load amount, as shown in FIG. 3, the controller detects the load amount by using the relationship between the pre-input back electromotive force and the load amount (S3). In accordance with the detected load, the drying operation such as the heating temperature of the heater 5, the rotation speed of the blower fan 13, and the drying time is optimally set.
예를 들어, 역기전력 감지센서(20)에 의해 측정된 역기전력량이 적은 경우는 부하량이 작은 것을 의미하므로, 이 부하량에 맞도록 히터(5) 가열온도를 낮게 하거나, 송풍팬(13)의 회전수를 적게 하여 풍량을 적게하며, 건조시간을 짧게 설정할 수 있다. 반대로, 역기전력 감지센서(20)에 의해 측정된 역기전력량이 많은 경우에는 부하량이 크기 때문에 히터(5) 가열온도를 높게 하고 풍량 및 건조시간이 많도록 설정한다.For example, when the amount of back electromotive force measured by the counter electromotive force sensor 20 is small, it means that the load is small, so that the heating temperature of the heater 5 is lowered or the rotation speed of the blower fan 13 is adjusted to match the load. The air volume can be reduced to reduce the drying time. On the contrary, when the amount of back electromotive force measured by the counter electromotive force sensor 20 is large, the load is large, so that the heating temperature of the heater 5 is increased and the air volume and drying time are set to be high.
상기와 같이 초기 건조 조건이 설정되어 건조행정을 수행하는 도중, 컨트롤러는 구동모터(10)를 정지 및 재가동하는 것을 수회 반복하며 역기전력 감지센서(20)로 부하량을 재검출하고, 이전 단계에서 검출된 부하량과 그 단계에서검출된 부하량 간의 차이에 의해 발생하는 부하량 변화율이 소정치(B) 이하로 되면 건조가 완료된 것으로 판단하여 건조행정을 종료시킨다.(S5)As the initial drying condition is set as described above, during the drying stroke, the controller repeatedly stops and restarts the driving motor 10 and redetects the load with the counter electromotive force sensor 20 and detects the load in the previous step. When the load change rate caused by the difference between the load amount and the load amount detected in the step becomes less than the predetermined value (B), it is determined that the drying is completed and the drying operation is terminated.
이상에서와 같이 본 발명에 따르면, 건조드럼을 구동시키는 구동모터의 초기 기동시에 부가되는 역기전력을 측정하여 부하량을 산출할 수 있고, 이 산출된 부하량에 따라 히터의 가열 온도 및/또는 건조시간 등의 건조 조건을 최적으로 설정하여 건조행정을 수행할 수 있게 된다.As described above, according to the present invention, the load amount can be calculated by measuring the counter electromotive force added at the initial start-up of the driving motor for driving the drying drum, and the heating temperature and / or drying time of the heater is determined according to the calculated load amount. It is possible to perform the drying administration by setting the drying conditions optimally.
또한, 검출된 부하량에 따라 최적의 건조조건을 설정하여 운전을 수행할 수 있으므로, 기존의 접촉식 건조도센서에서 발생할 수 있는 과건조의 위험과 건조행정의 조기 종료와 같은 문제점을 해결할 수 있다.In addition, since the operation can be performed by setting the optimum drying conditions according to the detected load amount, problems such as the risk of overdrying and early termination of the drying administration that can occur in the conventional contact dryness sensor can be solved.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020020052548A KR20040021099A (en) | 2002-09-02 | 2002-09-02 | Clothes dryer and method for controlling the same |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020020052548A KR20040021099A (en) | 2002-09-02 | 2002-09-02 | Clothes dryer and method for controlling the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100669180B1 (en) * | 2005-12-19 | 2007-01-16 | 주식회사 대우일렉트로닉스 | Method for detecting unbalance using back-emf in drum washer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07112097A (en) * | 1993-10-19 | 1995-05-02 | Hitachi Ltd | Clothes drier |
| KR970015850A (en) * | 1995-09-27 | 1997-04-28 | 배순훈 | Optimum Drying Time Detection Device for Washing Machine and Method |
| KR980009628A (en) * | 1996-07-31 | 1998-04-30 | 다까노 야스아끼 | Clothes dryer |
| JP2000229192A (en) * | 1999-02-10 | 2000-08-22 | Matsushita Electric Ind Co Ltd | Washing/drying machine |
-
2002
- 2002-09-02 KR KR1020020052548A patent/KR20040021099A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07112097A (en) * | 1993-10-19 | 1995-05-02 | Hitachi Ltd | Clothes drier |
| KR970015850A (en) * | 1995-09-27 | 1997-04-28 | 배순훈 | Optimum Drying Time Detection Device for Washing Machine and Method |
| KR980009628A (en) * | 1996-07-31 | 1998-04-30 | 다까노 야스아끼 | Clothes dryer |
| JP2000229192A (en) * | 1999-02-10 | 2000-08-22 | Matsushita Electric Ind Co Ltd | Washing/drying machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100669180B1 (en) * | 2005-12-19 | 2007-01-16 | 주식회사 대우일렉트로닉스 | Method for detecting unbalance using back-emf in drum washer |
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